Fulfilment by Amazon (FBA) is a service Amazon offers sellers that lets them store their products in Amazon's warehouses, and Amazon directly does the picking, packing, shipping and customer service on these items. Something Amazon hopes you'll especially enjoy: FBA items are eligible for and for Amazon Prime just as if they were Amazon items.

Enormous Capacity: Charges the iPad Air more than once, the Galaxy S5 four times, the iPhone 5s over seven times and other smartphones multiple times. Recharges in 8-9 hours with a 2 amp adapter (not included) and the included Micro USB cable.

Superior Quality: Premium LG cells, cutting-edge circuitry and a sturdy gloss exterior ensure reliability and safety. To activate the LED flashlight, hold or double click the power meter button.

Fulfilment by Amazon (FBA) is a service Amazon offers sellers that lets them store their products in Amazon's warehouses, and Amazon directly does the picking, packing, shipping and customer service on these items. Something Amazon hopes you'll especially enjoy: FBA items are eligible for and for Amazon Prime just as if they were Amazon items.

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Enormous CapacityEnough power to keep you going for days. Charge an iPhone 5s over seven times, a Galaxy S5 four times or an iPad Air more than once.

Our Most Compact YetUsing ultra-high density cells, we've packed 25% more power into exactly the same sized unit as the Astro E4 (the E5's little sister).

Superior QualityWe use only premium LG battery cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety.

World Famous WarrantyAt Anker, we believe in our products. That's why we back them all with an 18-month warranty and provide friendly, easy-to-reach support.

For Optimal Use:• Use the included cable, your original cable or a third-party certified one (such as MFi).• Compatible with Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the iPod nano, iPod Classic, HP TouchPad, Dell Venue 11 Pro, Asus tablets and some GPS and Bluetooth devices.

Most Helpful Customer Reviews

It arrived quickly, securely packaged. The instructions are clear and simple.

The item itself is chunky, not too heavy and gives an impresson of solidity and quality. It just looks ... an attractive bit of kit. It arrived (I would guess) about 80% charged and it took about 45 mins to charge fully, when connected to a USB port on my PC.

I am delighted with this unit - it seems to do exactly what it says on the tin! The tiny gripe? The two connectors supplied (one Apple 30 pin adapter, one Samsung ditto) look a bit flimsy (and Samsung is misspelled!). Not a worry for me, as I'm an Apple user and would use the USB connectors supplied with their products.

Review edited 19/9/13 and this added:

I charged the Anker Astro E5 fully and plugged it into my iPad2, which had only 1% battery capacity left. These were the results:After 1 hour - 34%.After 2 hours - 63%.After 3 hours - 88%.100% capacity was reached after a fraction under 4 hours (about 3hr 55min). There were still two lights showing on the unit, indicating 25-50% charge remaining.

Frankly, I think that is superb performance! Delighted with the product...!!!

I bought one of these so that our mobile phones would not run out of power over a three day period, for a short camping trip. My daughter has an iPhone 4S which is very power hungry and I have a Sony Xperia Z Android phone which also uses a lot of battery but on a normal charge lasts a whole day. On previous camping trips, mobiles have run out on the first night and we've had to either do without the phones (yeah right!) or charge our phones in the car by running the chargers using the engine - hardly economical... So I was on the lookout for a decent solution. I found plenty of these types of chargers with a much lower mAH capacity, then I found this on Amazon and was very excited with the ultra high capacity of 15000 mAH (my phone holds 2500 mAH on its internal battery) so this was very appealing. I wasn't disappointed, the quality of the product is great, feels very well built and is a nice solid weight. It has one port to charge, which takes a few hours for a full charge - displayed as four blue lights when complete. It has two charging ports which means you can charge two devices at the same time. This meant that at the end of the day when going to bed, we could plug both the iPhone and my Sony phone into the Anker and by morning we would have both devices at 100% - by the way the charger is not on all of that time, it automatically turns itself off when the phones are fully charged, perfect. This routine carried on for three days and when leaving we still had two blue lights, meaning that it had only used approximately half of the full charge, brilliant. This in turn means that a single phone user would probably be able to charge their phone between 5-7 days, which is pretty awesome.Read more ›

A great product, does exactly what it says on the can. However, is it just me or does anybody else have a problem keeping the power usb plug in? If you knock mine even a fraction, out it pops and stops charging. Apart from that minor design defect, a 5-star product!

Update: having posted this, I remembered that the device came with a USB lead. On checking this, I noticed that the plug was significantly longer than my standard, Samsung, one. When I inserted this lead, it made a considerably firmer and more secure contact. Rating amended accordingly, now I need to remember to only use this lead to charge up the device.

I was supplied a sample for test and evaluation, and I promised that my review is fair and honest.

I own both the Anker Astro Mini and the Anker SlimTalk. I use either of the two batteries for everyday commute to and from work. My iPhone 5 is a battery hog and I need any of the above batteries that are both lightweight, as backup. However, the above batteries can only supply 1-1.5 full charges to the iPhone. Because of this limitation, I need a larger backup battery for long travel like (e.g. long haul flights, long bus/car rides).

I received the Anker Astro E5 battery in time for our Adirondack vacation. The dual ports really come in handy as you can share the battery with your companions or charge two devices simultaneously. The kids all brought their gaming device and iPads, and us - our Smartphones. We can not rely on the car charger as it can only charge a GPS device or smartphone and not an iPad. I'm glad that the Anker Astro E5 can supply as much juice as to charge an iPad along with another Smartphone or a gaming device.

The Anker Astro E5 is a bit heavier than my other Anker external batteries. Tested a fully-charged E5; it can supply 2 full charges to a Smartphone, 2 full charges to an iPad, plus 1 full charge to a gaming device and a bluetooth headset. Pretty impressive for a device that is not as heavy as I was expecting it to be. I also believe that this external battery will also come in handy in cases of emergencies, hurricanes and blackouts. It also comes with a LED flashlight feature which you can use to locate adapters and connections while in the dark (night time travel, blackouts, etc.).

Size and weight is not as bulky as my old Zagg external battery. Size is almost equivalent to a regular 2.5 inch external hard drive.Read more ›